Research on an Input Coupler for a Ka-band Large-orbit Gyro-TWT with Dielectric-loaded Waveguide
An input coupler for a Ka-band large-orbit gyrotron traveling-wave tube(gyro-TWT)is de-signed.The input coupler is a Y-type converter,which transforms the TE10 mode in rectangular waveguide into the TE21 mode in circular waveguide.The transformation theory of it is briefly introduced,the param-eters are determined through simulation and a prototype is fabricated and tested.The test result meets the input requirements for the Ka-band large-orbit gyro-TWT.
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